Electeic lamp foe bicycles



(No Model.) 4 Sheets-Sheet 1.

G. MAYR.

ELECTRIC LAMP FOR BIOYGLES.

Patented June 19 WW I 09; map. $4.94

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HosRAPmmz commw WASHINGTON. D c.

(No Model.) 4 Sheets-Sheet 2.

G. MAYR. ELECTRIC LAMP FOR BIOYGLES.

No. 521,721. Patented'Jgnga 19,1894.

=- I h v 4 Sheets-Sheet 3.

(No Model.)

G. MAYR.

ELECTRIC LAMP FOR BIGYGLBS.

No. 521,721. Patented June 19,1894.

YMMV/1W4 JAM/Mm (No Model.) 4 Sheets-Shet 4. G. MAYR. ELECTRIC LAMP FOR BIGYOLES.

No. 521,721. Patented June 19,1894.

4. W vazhj UNITED STATES PATENT OFFICE.

GEORGE MAYR, OF BROOKLYN, ASSIGNOR OF ONE-HALF TO ELKIN FARMER, OF NEW YORK, N. Y.

ELECTRIC LAMP FOR BICYCLES.

SPECIFICATION forming part of Letters Patent No. 521,721, dated June 19, 1894.

Application filed November '7, 1893. Serial No. 490,307. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE MAYR, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York,

have invented certain new and useful Improvements in Electric Lamps for Bicycles, which improvements are fully set forth in the following specification and accompanying drawings, in which drawings- 1 9 Figure l is a side view of the dynamo, showing the same applied to a portion of the frame of a bicycle, the view being partly in section to better disclose the form of the field-magnets and the construction of the armature.

I5 Fig. 2 is a front view of same, and shows the character and disposition of certain gearing mechanism availed of for imparting to the armature the requisite rotary motion. Fig. 3 is a top plan view of the dynamo, partly in section, and shows the winding of the armature and field-magnets, the disposition of the commutator-brushes, and certain minor details of construction. Fig. 4. is a bottom plan view, in horizontal section, the section being taken on the line 02-00 of Fig. 2. Fig. 5 is a side elevation of that portion of the frame containing the gearing-mechanism, the two outer bearing-pieces being removed to more fully disclose the gearing elements.

Fig. 6 is a front elevation of said frameportion, containing the gearing-mechanism, the two outer bearing-pieces being retained. Fig. 7 is a detailed side view of the dynamo sprocket'wheel, showing the driving-con- 3 5 nection thereon. Fig. 8 is a side elevation of a bicycle, showing my invention applied thereto.

Similar reference-letters denote like parts in the different views.

This invention relates generally to that class of appliances known as bicycle lamps, and particularly to that character of bicycle lamp in which the production of light is effected through the medium of current-electricity, the latter being generated by means of a dynamo-electric machine. Its object is to provide an electric lamp for bicycles in which thecurrent-electricity shall be generated by means of adynamo-electric machine, the disposition of which, with reference to the bicycle, shall be such as to renderpracticable the communication thereto of motion from one Wheel of the bicycle, in the event of the latter being turned or rotated upon its axis; which shall admit of ready application to, and removal from, a suitable part of the bicycle-frame; and which shall be simple and cheap in constructiomand efficient in opera tion.

The invention consists of the novel arrangement of the various parts, of certain combinations thereof, and of certain details of construction, all of which will be specifically referred to hereinafter.

Having referenceto the drawings, the letters A, A, denote respectively top and bottom plates, or frame-pieces of the dynamo, which plates are each provided with an extension B, B, having a head a, 1), formed integral therewith and provided "with offsets a, a, b, b. The form of the heads a, b, is such as to admit of their taking partly around a suitable portion of the bicycle-frame, as the piece 0, Where they are preferably held by means of the clamps D, D. The clamps D, D, are respectively pivotally connected at one end thereof, in the manner of a hinge, to the offsets a, b; and each of said clamps is so shaped as to admit of its taking around the opposite half of the piece O, and forming with the head to which it is pivotally connected,

a complete collar around the piece 0. These clamps D, D, are each provided at their respective free ends, with an offset 0, d, adapted to coincide with the offsets a,b, upon said clamps being closed around the piece 0; and the clamps named may be locked in this position by means of suitable fasteners, as the screws 0, c, d, d.

The magnet-pieces E, E, preferably of soft iron, serve to connect the frame-pieces A, A, the latter pieces being also connected by a vertical frame-piece, within which certain gearing-mechanism is disposed; which lastnamed frame-piece also abuts against, and is 95 connectedwith,themagnet-piecesE,E. The junctions between these parts are effected by means of suitable fasteners, as the various screws shown in the drawings.

The vertical frame-piece, above named, consists of a series of upright, parallel, bearingpieces, F, F F, united integrally by the end sections e, e; and the piece as a whole, being of brass or other suitable material, may be readily produced by casting. Nithin this vertical frame-piece is disposed certain gearingmechanism, as above stated; which gearingmechanism consists of suitable drivers and followers, or spur-wheels and pinions, and will now be described.

The shaft fbears at its inner end in the piece F, and centrally in the piece F, the said shaft extending outwardly through the piece F, and having firmly mounted upon its outwardly-projecting end, a sprocket-wheel G. Intermediate of the pieces F, F, there is disposed a spur-wheel g, the same being firmly mounted upon the shaft f. The shaft It bears at its inner end in the piece F, extends outward through a suitable openingin the piece F, and bears at its outer end in the piece F. The pinion g, is firmly mounted upon the shaft h, at a point intermediate of the pieces F, F, and is adapted to stand at all times in mesh with the spur-wheel g. There is also firmly mounted upon the shaft 7t, at a point intermediate of the pieces F, F, a spurwheel 7). The shaftj bears respectively at its inner and outer ends in the pieces F, F, and there is firmly mounted upon this shaft j, a pinion i, which stands at all times in mesh with the spur-wheel 2'. There is also mounted. firmly upon the shaftj, intermediate of the pinion i and the piece F, a spurwheel Zr, adapted to mesh at all times with the pinion Z0, the latter being firmly mounted upon the armature-shaft H, which bears at its inner end in the piece F, and at its outer end in the lateral, angular, bearing-piece I, secured, by means of suitable fasteners, as the screws shown in the drawings, to the respective magnet-pieces E, E, near the lower ends thereof.

The armature, which is preferably of that type commonly termed drum armatures, consists, primarily, of the core Z, of non-conductive material and firmly secured upon the shaft H, and a series of soft-iron, flat rings, a, carried by the core Z, each of said rings being suitably insulated from the adjoining one, and the whole being wound longitudinally, at intervals circumferentially, with suitable insulatedwirem. Therectanguiarcoils thus formed should correspond in number with the elementary sections of the commutator, J, carried by the shaft H, as shown in full lines in Fig. 3, and in dotted lines in Fig. 1; and each of the coils named starts from one of the commutator-sections mentioned, and terminates at the following one, from which, again, the succeeding coil starts and terminates at the next following commutator-section; and so on, till each coil shall have been likewise connected to said commutator-sections.

The commutator J, as a whole, is firmly disposed upon the neck 3', of the core Z, and said neck, being of non conductive material, serves to insulate the commutator J from the shaft 11, which is essential; and it is further struction.

essential that each elementary section of the commutator, be duly insulated from the adjoining sections.

The armature, as a whole, is disposed transversely between the electro-magnets E, E, near the base thereof, each of said magnets being formed so as to extend partially around the same, as shown in Fig. 1.

The studs Z, Z, extend inwardly from the angular, bearing-piece I, one upon either side of the commutator J, and support the brushes 4%, n, which extend from the studs Z, Z, in opposite directions to, and are adapted to press at all times against, the commutator J, upon opposite sides thereof. The circuitbranch 0, leads from the stud Z to the binding-post o.

The electromagnets E, E, are suitably wound with insulated wire, as p, one end of which is connected to the stud Z, and the other end thereof to the binding-post 0".

It may be here mentioned that the top and bottom plates A, A, the vertical frame-piece consisting of the bearing-pieces F, F, F, and end-sections, e, e, and the lateral, angular, bearing-piece I, should be formed from some suitable non-magnetic material, preference being given to brass.

The dynamo described herein may be kept,

free from dust and dirt by inclosing the same in a case or covering of any suitable material and of any ordinary construction.

Referring to Fig. 8 of the drawings, the sprocket-wheel s, is firmly mounted on the hub of the rear wheel L, of the bicycle, and the driving connection, or endless-chain t,

ICO

thereon, extends to and around the small sprocket-Wheel G, of the dynamo, the latter being applied to the piece 0, of the bicycle frame, as hereinbefore explained. The cir cuit-wires v, o, extend respectively from the binding-posts 0, 0, along the piece 0, and the frame-piece O, to the lamp K, where they are connected in the customary Way, the lamp K being of any well-known and approved con- A cut-off, of any suitable and approved construction and having a stem 8, or equivalent, may also be applied to the lamp K.

It will be seen from the foregoing description of my invention and the explanation of the application thereof to a bicycle, that, upon the wheel L being rotated, as when, for instance, the bicycle is being propelled by a rider, a high, rotary motion will be imparted to the armature of the dynamo, through the medium of the driving-chain t and intermediate gearing-mechanism; and the current thus generated will be conducted to and from the lamp K, through the medium of the circuit-wires v, o.

I do not limit myself to the precise construction shown and described herein, as the gearing-mechanism employed, and other elements of the general structure,- may be varied materially without departing from the spirit of my invention.

Having fully described my invention and IIO stated in what manner the same is to be used, what I claim, and desire to secure by Letters Patent, is

1. A dynamo-electric generator, consisting of top and bottom frame-pieces, each provided with a suitable head, having a clamping-device pivotally connected therewith, suitable field-magnets and a gearing frame-portion, connecting said top and bottom plates, a lateral bearing-piece secured to said magnets, a horizontal shaft, carrying suitable armature parts, a commutator, and a pinion, the said shaft being disposed transversely between the field-magnets, and bearing respectively at its inner and outer ends in the gearing frame portion and lateral bearing piece above named, a train of gearing-mechanism within said frame-portion, the initial driver of the gearing-mechanism being carried by a shaft having a sprocket-Wheel mounted thereon, and the final driver thereof being adapted to mesh at all times with the said pinion on the armature-shaft, and two suitably-disposed commutator-brushes, one being directly connected with one of the field-magnets, substantially as herein described.

2. In combination with a dynamo-electric generator, composed, in part, of a gearing frame-piece, and a horizontal, armature-shaft carrying a pinion, a train of gearing-mechanism, disposed in said gearing frame-piece, the initial driver thereof being carried by a shaft having a sprocket-wheel mounted thereon, and the final driver thereof being adapted to mesh at all times with the said pinion on the armature-shaft, all substantially as described and for the purpose set forth.

3. In combination with a bicycle, having a sprocket-Wheel mounted on the hub of one Wheel thereof, a dynamo-electric generator, consisting, in part, of a gearing frame-piece, a horizontal armature-shaft carrying a pinion, and a train of gearing-mechanism, disposed in said frame-piece, the initial driver of the gearing-mechanism being carried by a shaft having a sprocket-Wheel mounted thereon, and the final driver thereof being adapted to mesh at all times with the said pinion on the armature-shat t, the said generator being suitably disposed upon the bicycle-frame, and a driving-connection, as the endless-chain t, on the sprocket-wheels named, all substantially as described and for the purpose set forth.

4. In combination with a bicycle, having a sprocket-wheel mounted on the hub of one wheel thereof, a dynamo-electric generator, suitably disposed upon the bicycle-frame and consisting, in part, of a gearing frame-piece, a horizontal armature-shaft carrying a pinion, and a train of gearing-mechanism, disposed in said frame-piece, the initial driver of the gearing-mechanism being carried by a shaft having a sprocket-Wheel mounted thereon, and the final driver thereof being adapted to mesh at all times with the said pinion on the armature-shaft, an electric lamp of any approved construction, mounted on the bicycleframe, and circuit-connections leading from said generator to said lamp, all substantially as described and for the purpose set forth.

GEORGE MAYR.

Witnesses:

J. M. STEWART, FR. NEMo RoEHRIoH. 

